Ancient Oldwalls parchment

 is an item in Bastard's Wound.

Description
You discovered this ancient parchment deep within the Bastard's Wound Oldwalls, but cannot decipher the notation printed on it. A recruited researcher might help you determine its origins and meaning.

Location

 * Darkened Hollow: On a body in the submerged area to the west.

Purpose
To understand the parchment, bring it to Sage Garus and then agree to hand it over to Sirin (or just give it to her directly). She will study it, learning the secrets meant only for her. If you havent done it yet, bring her to Cairn's passage. Afterwards, in Act III her Songbird's Bridle will be upgraded to an artifact (if you dont burn her notes).